If you see an explanation or practice problem that's not quite right, click "Edit" to make changes. That will take you to the editor just like if you were writing a new explanation or problem, except you'll see everything that's already been written for the one you're editing.
You can edit explanations to fix errors or make the language more clear. If you think the topic should be explained in a totally different way, however, you should add a new explanation.
After you make the change, click "Submit suggestion." You'll be prompted to enter a short description for your edit. When you click "Submit," your edit will be sent to the original author as well as our moderators to wait for approval.
If you see an error while working on practice problems, click "Report" to let us know what's going on.